Here is an example for 1:1 unidirectional relationship from B to A:
In B:
/**
* @ejb.relation
* name="A-B"
* role-name="B-has-A"
* target-ejb="A"
* target-role-name="A-belongsto-B"
* target-multiple="false"
* @jboss.relation
* related-pk-field="id"
* fk-column="a_fk"
* @ejb.interface-method
*/
public abstract ALocal getA();
/**
* @ejb.interface-method
*/
public abstract void setA(ALocal value);
Resulting DDs:
ejb-jar.xml:
<ejb-relation >
<ejb-relation-name>A-B</ejb-relation-name>
<ejb-relationship-role >
<ejb-relationship-role-name>B-has-A</ejb-relationship-role-name>
<multiplicity>One</multiplicity>
<relationship-role-source >
<ejb-name>B</ejb-name>
</relationship-role-source>
<cmr-field >
<cmr-field-name>a</cmr-field-name>
</cmr-field>
</ejb-relationship-role>
<ejb-relationship-role >
<ejb-relationship-role-name>A-belongsto-B</ejb-relationship-role-name>
<multiplicity>One</multiplicity>
<relationship-role-source >
<ejb-name>A</ejb-name>
</relationship-role-source>
</ejb-relationship-role>
</ejb-relation>
jbosscmp-jdbc.xml:
<ejb-relation>
<ejb-relation-name>A-B</ejb-relation-name>
<ejb-relationship-role>
<ejb-relationship-role-name>B-has-A</ejb-relationship-role-name>
<key-fields/>
</ejb-relationship-role>
<ejb-relationship-role>
<ejb-relationship-role-name>A-belongsto-B</ejb-relationship-role-name>
<key-fields>
<key-field>
<field-name>id</field-name>
<column-name>a_fk</column-name>
</key-field>
</key-fields>
</ejb-relationship-role>
</ejb-relation>
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